Global Disease Burden — MCQs
Based on healthcare utility values and life expectancy, which of the following measures can be calculated? Consider a scenario where the average life expectancy for a woman in Japan is 87 years, and there is an increase in life expectancy due to healthcare advancements.
Which is the least common cause among these of infant mortality in India?
WHO global target for prevention and control of non communicable diseases by 2025 is to decrease the prevalence of raised blood pressure (hypertension) by
Which of the following statements is TRUE regarding Disability-Adjusted Life Year (DALY)?
Which of the following diseases shows the LEAST difference in incidence between rural and urban populations?
What is the prevalence in a given population of 1000, where there are 50 new cases of lung cancer and 100 old cases of lung cancer in the same population?
As per the Government of India guidelines, the daily dose of elemental iron recommended for prophylaxis during pregnancy is
Epidemic marker of TB?
In which year was the World Health Organization (WHO) established?
The term "Barefoot Doctors" refers to a healthcare system originating from which country?
Global Disease Burden Indian Medical PG Practice Questions and MCQs
Question 1: Based on healthcare utility values and life expectancy, which of the following measures can be calculated? Consider a scenario where the average life expectancy for a woman in Japan is 87 years, and there is an increase in life expectancy due to healthcare advancements.
- A. HALE
- B. DALY
- C. DFLE
- D. QALY (Correct Answer)
Explanation: ***QALY*** - **Quality-Adjusted Life Years (QALYs)** combine the length of life with the **quality of life** lived, taking into account healthcare utility values (e.g., from 0 for dead to 1 for perfect health). - An increase in life expectancy due to healthcare advancements, coupled with assumed utility values, directly enables the calculation of QALYs gained or lost. *HALE* - **Health-Adjusted Life Expectancy (HALE)** is a measure of the average number of years that a person can expect to live in "**full health**" by adjusting for years lived in less than full health due to disease or injury. - While it incorporates health status, it specifically focuses on time lived in full health rather than the utility-weighted quality of life over the entire lifespan as QALYs do. *DALY* - **Disability-Adjusted Life Years (DALYs)** measure the total number of healthy years lost due to disease, disability, or premature death. - DALYs are a measure of disease burden, quantifying years lost, whereas QALYs are a measure of health gains or health states. *DFLE* - **Disability-Free Life Expectancy (DFLE)** measures the expected number of years an individual will live without disability. - While it considers the absence of disability, it does not incorporate the concept of "utility values" or varying degrees of health-related quality of life beyond a binary disabled/non-disabled state, as QALYs do.
Question 2: Which is the least common cause among these of infant mortality in India?
- A. Infections
- B. Birth injuries (Correct Answer)
- C. Congenital malformations
- D. Prematurity
Explanation: ***Birth injuries*** - While significant in some contexts, **birth injuries** are a less common cause of infant mortality in India compared to other factors like infections, prematurity, and congenital malformations. - Progress in **obstetric care** and improvements in delivery practices have helped reduce their incidence as a primary cause of death. *Infections* - **Infections**, particularly **neonatal sepsis**, pneumonia, and diarrhea, remain a leading cause of infant mortality in India. - Poor sanitation, lack of access to clean water, and inadequate vaccination coverage contribute significantly to their prevalence. *Congenital malformations* - **Congenital malformations** (birth defects) are a substantial cause of infant mortality in India, particularly those affecting the heart, brain, and neural tube. - Early detection and intervention for these conditions are often limited, increasing their impact on mortality rates. *Prematurity* - **Prematurity** (being born too early) and its associated complications, such as respiratory distress syndrome and low birth weight, are major contributors to infant mortality in India. - Many premature infants struggle with underdeveloped organs and systems, making them highly vulnerable in the first few weeks of life.
Question 3: WHO global target for prevention and control of non communicable diseases by 2025 is to decrease the prevalence of raised blood pressure (hypertension) by
- A. 75%
- B. 25% (Correct Answer)
- C. 90%
- D. 55%
Explanation: ***25%*** - The World Health Organization (WHO) set a **global target** to achieve a **25% relative reduction** in the prevalence of **raised blood pressure (hypertension)** by 2025 (compared to 2010 baseline). - This target is part of the **WHO Global Action Plan for NCDs** and the Global Monitoring Framework to combat **non-communicable diseases (NCDs)**. *75%* - A 75% reduction in hypertension prevalence is an **unrealistically ambitious** target given current global health challenges and interventions. - While significant reductions are desired, the evidence-based target set by WHO is a more achievable 25% reduction. *90%* - A 90% reduction is not one of the specifically stated **WHO global targets** for hypertension by 2025. - Such a drastic reduction would require unprecedented public health interventions and is not supported by current evidence. *55%* - 55% is not a recognized **WHO target** for the prevention and control of hypertension by 2025. - The established global target from the WHO NCD Global Monitoring Framework specifically focuses on a **25% relative reduction**.
Question 4: Which of the following statements is TRUE regarding Disability-Adjusted Life Year (DALY)?
- A. Years lost due to disability (YLD) are not considered in DALY.
- B. DALY only measures mortality and does not include morbidity.
- C. DALY does not account for both YLD and YLL.
- D. DALY includes both Years of Life Lost (YLL) and Years Lived with Disability (YLD). (Correct Answer)
Explanation: ***DALY includes both Years of Life Lost (YLL) and Years Lived with Disability (YLD).*** - This statement is **correct**. The fundamental formula is **DALY = YLL + YLD**. - **YLL (Years of Life Lost)** quantifies the burden of premature mortality by measuring years of potential life lost due to early death. - **YLD (Years Lived with Disability)** quantifies the burden of morbidity by measuring time lived in states of less than full health. - **DALY** is a comprehensive health metric designed to capture the total burden of disease by integrating both mortality and morbidity components. - This unified metric allows comparison of disease burden across different conditions and populations. *Years of Life Lost (YLL) is not included in DALY calculations.* - This is **incorrect**. YLL is a core component of DALY calculations, representing the mortality burden. *Years lost due to disability (YLD) are not considered in DALY.* - This is **incorrect**. YLD is an essential component of DALY, representing the morbidity burden. *DALY only measures mortality and does not include morbidity.* - This is **incorrect**. DALY explicitly measures both mortality (through YLL) and morbidity (through YLD), making it a comprehensive burden of disease measure.
Question 5: Which of the following diseases shows the LEAST difference in incidence between rural and urban populations?
- A. Lung Cancer
- B. TB (Correct Answer)
- C. Bronchitis
- D. Mental illness
Explanation: ***Correct: TB*** - **Tuberculosis (TB)** shows relatively **similar incidence rates** in both rural and urban populations in India, making it the disease with the **LEAST difference** between the two settings. - While urban areas have **overcrowding and slums** as risk factors, rural areas have **poverty, malnutrition, and poor access to healthcare**, which are equally important TB risk factors. - TB is endemic in India across all geographic settings, with the disease burden driven more by **socioeconomic factors** than by rural vs urban location per se. - Both settings face challenges with **poor ventilation** (urban slums vs rural housing), **poverty**, and **inadequate sanitation**. *Incorrect: Lung Cancer* - Lung cancer shows a **clear urban predominance** due to higher exposure to **industrial air pollution**, **vehicular emissions**, and **occupational carcinogens**. - Urban populations historically had higher smoking rates, though this gap is narrowing. - Rural areas have significantly lower lung cancer incidence. *Incorrect: Bronchitis* - Chronic bronchitis is **more common in urban areas** due to **air pollution** from industries and vehicles. - While rural areas may have biomass fuel smoke exposure, the overall incidence of bronchitis shows notable rural-urban differences. - Urban environmental factors contribute to higher prevalence of chronic obstructive airway diseases. *Incorrect: Mental illness* - While mental illness occurs in both settings, there are **differences in types and recognition**. - Urban areas may have higher reported rates due to better access to mental health services and less stigma in seeking care. - Rural areas face challenges with **underdiagnosis** and **limited mental health infrastructure**, making true incidence comparisons difficult.
Question 6: What is the prevalence in a given population of 1000, where there are 50 new cases of lung cancer and 100 old cases of lung cancer in the same population?
- A. 1.50%
- B. 15% (Correct Answer)
- C. 150
- D. 13%
Explanation: ***Correct: 15%*** - **Prevalence** is the proportion of a population living with a disease at a specific time point. It includes both new and existing (old) cases. - **Calculation:** Total cases = 50 (new cases) + 100 (old cases) = 150 cases - **Prevalence rate** = (150 / 1000) × 100% = **15%** - Prevalence answers the question: "What proportion of the population has the disease right now?" *Incorrect: 1.50%* - This value represents a calculation error, likely from dividing 150 by 10,000 instead of 1,000 - It underestimates the actual prevalence by a factor of 10 - Would only be correct if there were 15 total cases, not 150 *Incorrect: 150* - This is the **absolute count** of individuals with lung cancer (both new and old cases) - Prevalence must be expressed as a **proportion or percentage**, not a raw count - Raw counts cannot be compared across populations of different sizes *Incorrect: 13%* - This would only be correct if there were 130 total cases, not 150 - This miscalculation fails to properly sum the new cases (50) and old cases (100) - The arithmetic is incorrect: 50 + 100 ≠ 130
Question 7: As per the Government of India guidelines, the daily dose of elemental iron recommended for prophylaxis during pregnancy is
- A. 150 mg/day for 100 days
- B. 200 mg/day for 100 days
- C. 100 mg/day for 100 days (Correct Answer)
- D. 50 mg/day for 100 days
Explanation: ***100 mg/day for 100 days*** - As per the **Government of India guidelines**, the recommended daily dose of **elemental iron** for prophylaxis during pregnancy is 100 mg/day. - This dose is typically continued for at least **100 days** to ensure adequate iron stores and prevent iron deficiency anemia. *150 mg/day for 100 days* - This dose exceeds the **recommended daily prophylactic** amount of elemental iron specified by Indian government guidelines. - While higher doses may be used for **therapeutic treatment** of existing iron deficiency anemia, it is not the standard for prophylaxis. *200 mg/day for 100 days* - This amount is significantly higher than the standard **prophylactic recommendation** for elemental iron during pregnancy in India. - Such a high dose would typically only be prescribed for **treating severe anemia**, not for routine prevention. *50 mg/day for 100 days* - This dose is lower than the **recommended daily amount** for effective iron prophylaxis according to the Government of India guidelines. - Such a dose might be **insufficient** to maintain adequate iron levels and prevent anemia during pregnancy.
Question 8: Epidemic marker of TB?
- A. Tuberculin test positivity rate
- B. Sputum AFB positivity rate (Correct Answer)
- C. Chest x-ray positivity rate
- D. None of the options
Explanation: ***Sputum AFB positivity rate*** - The **sputum acid-fast bacilli (AFB) positivity rate** directly indicates the number of individuals actively shedding viable *Mycobacterium tuberculosis* in their respiratory secretions. - This metric reflects the **infectious pool** within a community, making it a robust marker for assessing ongoing transmission and the epidemic status of tuberculosis. *Tuberculin test positivity rate* - The **tuberculin skin test (TST)** measures exposure to TB and latent infection, not active, infectious disease. - A high positivity rate indicates a high prevalence of **latent TB infection**, but doesn't differentiate between old exposure, cleared infection, or active disease, nor does it directly measure transmissibility. *Chest x-ray positivity rate* - **Chest X-rays** can identify pulmonary abnormalities consistent with TB, including active disease. - However, CXR findings are **non-specific** for TB and can be suggestive of previous infection or other lung conditions, making it less precise than sputum AFB for defining an active epidemic. *None of the options* - This option is incorrect because the **sputum AFB positivity rate** is a well-established and direct indicator of active TB disease transmission and epidemic activity.
Question 9: In which year was the World Health Organization (WHO) established?
- A. 1945 (Correct Answer)
- B. 1948
- C. 1950
- D. 1956
Explanation: **Explanation:** The correct answer is **A. 1945**. The World Health Organization (WHO) was technically established on **October 24, 1945**, when the United Nations (UN) Charter was signed, mandating the creation of a specialized health agency. While the WHO Constitution was drafted in 1946 and came into force in 1948, the legal foundation and the decision to establish the organization date back to the 1945 UN Conference in San Francisco. **Analysis of Options:** * **B. 1948:** This is a common distractor. On **April 7, 1948**, the WHO Constitution was ratified by 26 member states, and the organization became a functional entity. This date is celebrated annually as **World Health Day**, but the establishment process began in 1945. * **C. 1950:** By this year, the WHO was already operational, having held its first World Health Assembly in 1948. * **D. 1956:** This year holds no specific significance regarding the founding of the WHO. **NEET-PG High-Yield Pearls:** * **Headquarters:** Geneva, Switzerland. * **World Health Day:** April 7th (commemorating the 1948 ratification). * **Objective:** The attainment by all peoples of the highest possible level of health. * **Structure:** Comprises the World Health Assembly (Supreme body), Executive Board, and Secretariat. * **WHO Regions:** There are 6 regions. India falls under the **South-East Asia Region (SEARO)**, headquartered in **New Delhi**.
Question 10: The term "Barefoot Doctors" refers to a healthcare system originating from which country?
- A. Mesopotamia
- B. Greece
- C. India
- D. China (Correct Answer)
Explanation: **Explanation:** The term **"Barefoot Doctors"** refers to a revolutionary healthcare model implemented in **China** during the Cultural Revolution (1960s–70s). These were rural health workers who received basic medical training (3–6 months) to provide primary healthcare, preventive services, and immunizations to the rural population. They were called "barefoot" because they often worked in rice paddies alongside farmers and were not part of the formal urban medical elite. This model was a precursor to the modern concept of **Primary Health Care (PHC)** and heavily influenced the **Alma-Ata Declaration of 1978**. **Analysis of Options:** * **A. Mesopotamia:** Known for the Code of Hammurabi, which included early laws regarding medical practice and fees, but not the barefoot doctor system. * **B. Greece:** Associated with Hippocrates (Father of Medicine) and the humoral theory of disease. * **C. India:** While India has similar cadres like ASHAs (Accredited Social Health Activists) and MPWs (Multi-Purpose Workers), the specific term and origin of "Barefoot Doctors" belong to China. **High-Yield Facts for NEET-PG:** * **Alma-Ata Declaration (1978):** Adopted the "Health for All by 2000 AD" goal, drawing inspiration from the Chinese model. * **Village Health Guides (VHG):** In India, the VHG scheme (launched in 1977) was directly inspired by the Barefoot Doctors of China. * **Key Concept:** The Barefoot Doctor system emphasizes **community participation** and **appropriate technology**, two pillars of Primary Health Care.
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